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EPOXI Moon Transits Earth
''EPOXI'' was a compilation of NASA Discovery program missions led by the University of Maryland, College Park, University of Maryland and principal investigator Michael A'Hearn, with co-operation from the Jet Propulsion Laboratory and Ball Aerospace & Technologies Corp., Ball Aerospace. ''EPOXI'' uses the ''Deep Impact (spacecraft), Deep Impact'' spacecraft in a campaign consisting of two missions: the ''Deep Impact Extended Investigation'' (DIXI) and ''Extrasolar Planet Observation and Characterization'' (EPOCh). ''DIXI'' aimed to send the ''Deep Impact'' spacecraft on a flyby of another comet, after its primary mission was completed in July 2005, while ''EPOCh'' saw the spacecraft's photographic instruments as a space observatory, studying extrasolar planets. ''DIXI'' successfully sent the ''Deep Impact'' spacecraft on a Flyby (spaceflight), flyby of comet 103P/Hartley, Hartley 2 on November 4, 2010, revealing a "hyperactive, small and feisty" comet, after three gravity assist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deep Impact (spacecraft)
''Deep Impact'' was a NASA space probe launched from Cape Canaveral Air Force Station on January 12, 2005. It was designed to study the interior composition of the comet Tempel 1 (9P/Tempel), by releasing an Deliberate crash landings on extraterrestrial bodies, impactor into the comet. At 05:52 UTC on July 4, 2005, the Impactor successfully collided with the comet's comet nucleus, nucleus. The impact excavated debris from the interior of the nucleus, forming an impact crater. Photographs taken by the spacecraft showed the comet to be more dusty and less icy than had been expected. The impact generated an unexpectedly large and bright dust cloud, obscuring the view of the impact crater. Previous space missions to comets, such as ''Giotto mission, Giotto'', ''Deep Space 1'', and ''Stardust (spacecraft), Stardust'', were Flyby (spaceflight), fly-by missions. These missions were able to photograph and examine only the surfaces of cometary nuclei, and even then from considerable dista ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flyby (spaceflight)
A flyby () is a spaceflight operation in which a spacecraft passes in proximity to another body, usually a target of its space exploration mission and/or a source of a gravity assist (also called ''swing-by'') to impel it towards another target. Spacecraft which are specifically designed for this purpose are known as flyby spacecraft, although the term has also been used in regard to asteroid flybys of Earth for example. Important parameters are the time and distance of closest approach. Spacecraft flyby Flyby maneuvers can be conducted with a planet, a natural satellite or a non-planetary object such as a small Solar System body. Planetary flybys have occurred with Mars or Earth for example: * List of Earth flybys * Mars flyby An example of a comet flyby is when International Cometary Explorer (formerly ISEE-3) passed about from the nucleus of Comet Giacobini-Zinner in September 1985. Another application of the flyby is of Earth's Moon, usually called a lunar flyby. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EPOXI Moon Transits Earth
''EPOXI'' was a compilation of NASA Discovery program missions led by the University of Maryland, College Park, University of Maryland and principal investigator Michael A'Hearn, with co-operation from the Jet Propulsion Laboratory and Ball Aerospace & Technologies Corp., Ball Aerospace. ''EPOXI'' uses the ''Deep Impact (spacecraft), Deep Impact'' spacecraft in a campaign consisting of two missions: the ''Deep Impact Extended Investigation'' (DIXI) and ''Extrasolar Planet Observation and Characterization'' (EPOCh). ''DIXI'' aimed to send the ''Deep Impact'' spacecraft on a flyby of another comet, after its primary mission was completed in July 2005, while ''EPOCh'' saw the spacecraft's photographic instruments as a space observatory, studying extrasolar planets. ''DIXI'' successfully sent the ''Deep Impact'' spacecraft on a Flyby (spaceflight), flyby of comet 103P/Hartley, Hartley 2 on November 4, 2010, revealing a "hyperactive, small and feisty" comet, after three gravity assist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectrometer
A spectrometer () is a scientific instrument used to separate and measure Spectrum, spectral components of a physical phenomenon. Spectrometer is a broad term often used to describe instruments that measure a continuous variable of a phenomenon where the spectral components are somehow mixed. In visible light a spectrometer can separate white light and measure individual narrow bands of color, called a spectrum. A mass spectrometer measures the spectrum of the masses of the atoms or molecules present in a gas. The first spectrometers were used to split light into an array of separate colors. Spectrometers were History_of_spectroscopy, developed in early studies of physics, astronomy, and chemistry. The capability of spectroscopy to determine Analytical_chemistry#Spectroscopy, chemical composition drove its advancement and continues to be one of its primary uses. Spectrometers are used in Astronomical spectroscopy, astronomy to analyze the chemical composition of Astronomical_spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
9P/Tempel
Tempel 1 (official designation: 9P/Tempel) is a periodic Jupiter-family comet discovered by Wilhelm Tempel in 1867. It completes an orbit of the Sun every 5.6 years. Tempel 1 was the target of the ''Deep Impact'' space mission, which photographed a deliberate high-speed impact upon the comet in 2005. It was re-visited by the ''Stardust'' spacecraft on 14 February 2011, and came back to perihelion in August 2016. On 26 May 2024, it made a modest approach to Jupiter at a distance of which will lift the perihelion distance and 9P will next come to perihelion on 12 February 2028 when it will be from the Sun. Discovery and orbital history Tempel 1 was discovered on April 3, 1867, by Wilhelm Tempel, who was working at Marseille. At the time of discovery, it approached perihelion once every 5.68 years (designations P/1867 G1 and 1867 II). It was subsequently observed in 1873 (P/1873 G1, 1873 I, 1873a) and in 1879 (1879 III, 1879b). Photographic attempts during 1898 and 1905 failed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comet Boethin
Comet Boethin (officially 85D/Boethin) was a periodic Jupiter-family comet discovered in 1975 by Leo Boethin. It appeared again in January 1986 as expected. Although the comet was next expected at perihelion in April 1997, no observations were reported, and the comet is thought to have disintegrated. It has not been observed since March 1986. The comet might have come to perihelion in late July 2020, but the uncertainty in the comet's position is hundreds of millions of km. The old orbit would have the comet next coming to perihelion around November 2031. Discovery circumstances The comet was discovered under unusual circumstances. Comet 85D/Boethin was the first comet discovered by an observer in the Philippines. Leo Boethin (1912-1998), who was assigned as Reverend of the Abra province in 1949, had taken advantage of the exceptionally dark skies of Luzon to observe comets and meteor showers. In January 1973, he found his first suspected comet at magnitude 9.5, but he saw it fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methods Of Detecting Extrasolar Planets
Methods of detecting exoplanets usually rely on indirect strategies – that is, they do not directly image the planet but deduce its existence from another signal. Any planet is an extremely faint light source compared to its parent star. For example, a star like the Sun is about a billion times as bright as the reflected light from any of the planets orbiting it. In addition to the intrinsic difficulty of detecting such a faint light source, the glare from the parent star washes it out. For those reasons, very few of the exoplanets reported have been detected directly, with even fewer being resolved from their host star. Established detection methods The following methods have proven successful at least once for discovering a new planet or detecting an already discovered planet: Radial velocity A star with a planet will move in its own small orbit in response to the planet's gravity. This leads to variations in the speed with which the star moves toward or away from Ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extrasolar Planet
An exoplanet or extrasolar planet is a planet outside the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first detected in 1988, was confirmed in 2003. In 2016, it was recognized that the first possible evidence of an exoplanet had been noted in 1917. In collaboration with ground-based and other space-based observatories the James Webb Space Telescope (JWST) is expected to give more insight into exoplanet traits, such as their Extraterrestrial atmosphere, composition, Natural environment, environmental conditions, and Extraterrestrial life, potential for life. There are many methods of detecting exoplanets. Astronomical transit, Transit photometry and Doppler spectroscopy have found the most, but these methods suffer from a clear observational bias favoring the detection of planets near the star; thus, 85% of the exoplanets detected are inside the tida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tempel 1
Tempel 1 (official designation: 9P/Tempel) is a periodic Jupiter-family comet discovered by Wilhelm Tempel in 1867. It completes an orbit of the Sun every 5.6 years. Tempel 1 was the target of the ''Deep Impact'' space mission, which photographed a deliberate high-speed impact upon the comet in 2005. It was re-visited by the ''Stardust'' spacecraft on 14 February 2011, and came back to perihelion in August 2016. On 26 May 2024, it made a modest approach to Jupiter at a distance of which will lift the perihelion distance and 9P will next come to perihelion on 12 February 2028 when it will be from the Sun. Discovery and orbital history Tempel 1 was discovered on April 3, 1867, by Wilhelm Tempel, who was working at Marseille. At the time of discovery, it approached perihelion once every 5.68 years (designations P/1867 G1 and 1867 II). It was subsequently observed in 1873 (P/1873 G1, 1873 I, 1873a) and in 1879 (1879 III, 1879b). Photographic attempts during 1898 and 1905 fai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hartley2jets2 Epoxi Big
Hartley may refer to: Places Australia *Hartley, New South Wales * Hartley, South Australia ** Electoral district of Hartley, a state electoral district Canada *Hartley Bay, British Columbia United Kingdom *Hartley, Cumbria *Hartley, Plymouth, Devon *Hartley Wespall, Hampshire *Hartley, Sevenoaks, Kent * Hartley, Tunbridge Wells, Kent * Hartley, Northumberland (Old Hartley), part of Seaton Sluice *New Hartley, Northumberland United States * Hartley, California *Hartley, Iowa * Hartley, Michigan *Hartley, South Dakota *Hartley, Texas *Hartley County, Texas *Brohard, West Virginia, also Hartley Zimbabwe *Chegutu, formerly Hartley People * Hartley (surname) * Hartley Burr Alexander, (1873–1939), American philosopher * Hartley Alleyne (born 1957), Barbadian cricketer * Hartley Booth (born 1946), British politician * Hartley Coleridge (1796–1849), English writer * Hartley Craig (1917–2007), Australian cricketer * Hartley Douglas Dent (1929–1993), Canadian politici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Year 2000 Problem
The term year 2000 problem, or simply Y2K, refers to potential computer errors related to the Time formatting and storage bugs, formatting and storage of calendar data for dates in and after the year 2000. Many Computer program, programs represented four-digit years with only the final two digits, making the year 2000 indistinguishable from 1900. Computer systems' inability to distinguish dates correctly had the potential to bring down worldwide infrastructures for computer-reliant industries. In the years leading up to the turn of the millennium, the public gradually became aware of the "Y2K scare", and individual companies predicted the global damage caused by the bug would require anything between $400 million and $600 billion to rectify. A lack of clarity regarding the potential dangers of the bug led some to stock up on food, water, and firearms, purchase backup generators, and withdraw large sums of money in anticipation of a computer-induced Global catastrophic risk, ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apollo Asteroid
The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo, discovered by German astronomer Karl Reinmuth in the 1930s. They are Earth-crossing asteroids that have an orbital semi-major axis greater than that of the Earth (a > 1 AU) but perihelion distances less than the Earth's aphelion distance (q < 1.017 AU). , the number of known Apollo asteroids is 21,083, making the class the largest group of near-Earth objects (''cf''. the Aten, Amor and Atira asteroids), of which 1,742 are [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
